EventStatusDto

{
    "delivery": {
        "is_delivered": true,
        "delivered_at": "2025-12-30T12:05:00.000Z",
        "failed": false,
        "failed_at": "2025-12-30T12:08:00.000Z",
        "failure_reason": "string"
    },
    "read": {
        "is_read": true,
        "read_at": "2025-12-30T12:06:00.000Z",
        "marked_by": "operator:123"
    },
    "deletion": {
        "is_deleted": false,
        "deleted_at": "2025-12-30T12:07:00.000Z",
        "deleted_by": "admin:123"
    },
    "sending": {
        "status": "queued",
        "error_user_message": "string",
        "error_internal": "string"
    }
}